不同类型地震波作用下大跨连体结构行波效应比较
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摘要
大跨连体结构是近二十年来发展起来的一种新型结构形式,受力性能较为复杂.以某高层大跨连体结构为背景,利用ANSYS软件建立三维有限元模型,从地震记录库中分别选取长周期地震波和普通地震波做为输入,采用大质量法对大跨连体结构进行了不同类型地震波作用下的行波效应分析与比较研究.结果表明:长周期地震波作用下大跨连体结构连廊杆件内力明显大于普通地震波作用下的结果;在纵向水平地震动激励下,横向水平杆的行波效应较明显,而竖向斜撑的行波效应影响较弱.
Large-span connective structure is a new type of structure in recent twenty years,which is complexity of stress.Based on a high-rise large-span connective structure,long period seismic waves and normal seismic waves were chosen from the earthquake records as the input on a three-dimensional finite element model which was created with ANSYS software.And then,structures under Large Mass Method was used to analyze and make relative comparison of wave-passage effect on large-span connective structures under different types of seismic waves.The result shows that axial forces of the steel truss bars are obviously higher under long period seismic waves than normal seismic waves.Besides,the wave-passage effects of longitudinal bars are especially prominent while the wave-passage effects of diagonal bracings are quite weak under lateral excitations.
Large-span connective structure is a new type of structure in recent twenty years,which is complexity of stress.Based on a high-rise large-span connective structure,long period seismic waves and normal seismic waves were chosen from the earthquake records as the input on a three-dimensional finite element model which was created with ANSYS software.And then,structures under Large Mass Method was used to analyze and make relative comparison of wave-passage effect on large-span connective structures under different types of seismic waves.The result shows that axial forces of the steel truss bars are obviously higher under long period seismic waves than normal seismic waves.Besides,the wave-passage effects of longitudinal bars are especially prominent while the wave-passage effects of diagonal bracings are quite weak under lateral excitations.
引文
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[3]Heredia-Zavoni E,Leyva A.Torsional Response of RymmetricBuildings to Incoherent and Phase Delayed Earthquake GroundMotion[J].Earthquake Engineering and Structural Dynamics,2003,32:1021-1038.
[4]楼梦麟,兰岚,黄明开.多点地震激励对大跨度结构抗震设计的影响[J].世界地震工程,2010,26(1):1-6.
[5]陈学伟,韩小雷,林生逸,等.中洲中心二期结构抗震性能分析[J].建筑结构,2010,31(1):101-109.
[6]汪素云,俞言祥,吕红山.利用中国数字地震台网宽频带记录研究长周期地震波反应谱特性[J].地震学报,1998,20(5):481-488.
[7]YE Jihong,ZHOU Shulu,BAO Wei.Vibration Test and Analy-sis of Laoshan Bicycle Gymnasium for The Olympic Games underMulti-Support Excita-tions[J].Sci China Ser E-Tech Sci,2008,51(9):1516-1529.
[8]谢礼立,周雍年,胡成祥,等.地震动反应谱的长周期特性[J].地震工程与工程振动,1990,10(1):1-19.
[9]臧明明,陈清军.长周期地震动的场地效应与大跨桥梁结构的动力响应分析[J].结构工程师,2010,26(1):119-126.
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